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Implement a bunch more TargetSelectionDAGInfo infrastructure.

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Move EmitTargetCodeForMemcpy, EmitTargetCodeForMemset, and
EmitTargetCodeForMemmove out of TargetLowering and into
SelectionDAGInfo to exercise this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103481 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-05-11 17:31:57 +00:00
parent 651804c3d6
commit ff7a562751
61 changed files with 626 additions and 463 deletions
Download Patch File Download Diff File Expand all files Collapse all files

55
include/llvm/Target/TargetLowering.h
View File

@@ -1194,61 +1194,6 @@ public:
return SDValue(); // this is here to silence compiler errors
}
/// EmitTargetCodeForMemcpy - Emit target-specific code that performs a
/// memcpy. This can be used by targets to provide code sequences for cases
/// that don't fit the target's parameters for simple loads/stores and can be
/// more efficient than using a library call. This function can return a null
/// SDValue if the target declines to use custom code and a different
/// lowering strategy should be used.
///
/// If AlwaysInline is true, the size is constant and the target should not
/// emit any calls and is strongly encouraged to attempt to emit inline code
/// even if it is beyond the usual threshold because this intrinsic is being
/// expanded in a place where calls are not feasible (e.g. within the prologue
/// for another call). If the target chooses to decline an AlwaysInline
/// request here, legalize will resort to using simple loads and stores.
virtual SDValue
EmitTargetCodeForMemcpy(SelectionDAG &DAG, DebugLoc dl,
SDValue Chain,
SDValue Op1, SDValue Op2,
SDValue Op3, unsigned Align, bool isVolatile,
bool AlwaysInline,
const Value *DstSV, uint64_t DstOff,
const Value *SrcSV, uint64_t SrcOff) const {
return SDValue();
}
/// EmitTargetCodeForMemmove - Emit target-specific code that performs a
/// memmove. This can be used by targets to provide code sequences for cases
/// that don't fit the target's parameters for simple loads/stores and can be
/// more efficient than using a library call. This function can return a null
/// SDValue if the target declines to use custom code and a different
/// lowering strategy should be used.
virtual SDValue
EmitTargetCodeForMemmove(SelectionDAG &DAG, DebugLoc dl,
SDValue Chain,
SDValue Op1, SDValue Op2,
SDValue Op3, unsigned Align, bool isVolatile,
const Value *DstSV, uint64_t DstOff,
const Value *SrcSV, uint64_t SrcOff) const {
return SDValue();
}
/// EmitTargetCodeForMemset - Emit target-specific code that performs a
/// memset. This can be used by targets to provide code sequences for cases
/// that don't fit the target's parameters for simple stores and can be more
/// efficient than using a library call. This function can return a null
/// SDValue if the target declines to use custom code and a different
/// lowering strategy should be used.
virtual SDValue
EmitTargetCodeForMemset(SelectionDAG &DAG, DebugLoc dl,
SDValue Chain,
SDValue Op1, SDValue Op2,
SDValue Op3, unsigned Align, bool isVolatile,
const Value *DstSV, uint64_t DstOff) const {
return SDValue();
}
/// LowerOperationWrapper - This callback is invoked by the type legalizer
/// to legalize nodes with an illegal operand type but legal result types.
/// It replaces the LowerOperation callback in the type Legalizer.

67
include/llvm/Target/TargetSelectionDAGInfo.h
View File

@@ -16,8 +16,13 @@
#ifndef LLVM_TARGET_TARGETSELECTIONDAGINFO_H
#define LLVM_TARGET_TARGETSELECTIONDAGINFO_H
#include "llvm/CodeGen/SelectionDAGNodes.h"
namespace llvm {
class TargetData;
class TargetMachine;
//===----------------------------------------------------------------------===//
/// TargetSelectionDAGLowering - Targets can subclass this to parameterize the
/// SelectionDAG lowering and instruction selection process.
@@ -26,9 +31,69 @@ class TargetSelectionDAGInfo {
TargetSelectionDAGInfo(const TargetSelectionDAGInfo &); // DO NOT IMPLEMENT
void operator=(const TargetSelectionDAGInfo &); // DO NOT IMPLEMENT
const TargetData *TD;
protected:
const TargetData *getTargetData() const { return TD; }
public:
TargetSelectionDAGInfo();
explicit TargetSelectionDAGInfo(const TargetMachine &TM);
virtual ~TargetSelectionDAGInfo();
/// EmitTargetCodeForMemcpy - Emit target-specific code that performs a
/// memcpy. This can be used by targets to provide code sequences for cases
/// that don't fit the target's parameters for simple loads/stores and can be
/// more efficient than using a library call. This function can return a null
/// SDValue if the target declines to use custom code and a different
/// lowering strategy should be used.
///
/// If AlwaysInline is true, the size is constant and the target should not
/// emit any calls and is strongly encouraged to attempt to emit inline code
/// even if it is beyond the usual threshold because this intrinsic is being
/// expanded in a place where calls are not feasible (e.g. within the prologue
/// for another call). If the target chooses to decline an AlwaysInline
/// request here, legalize will resort to using simple loads and stores.
virtual SDValue
EmitTargetCodeForMemcpy(SelectionDAG &DAG, DebugLoc dl,
SDValue Chain,
SDValue Op1, SDValue Op2,
SDValue Op3, unsigned Align, bool isVolatile,
bool AlwaysInline,
const Value *DstSV, uint64_t DstOff,
const Value *SrcSV, uint64_t SrcOff) const {
return SDValue();
}
/// EmitTargetCodeForMemmove - Emit target-specific code that performs a
/// memmove. This can be used by targets to provide code sequences for cases
/// that don't fit the target's parameters for simple loads/stores and can be
/// more efficient than using a library call. This function can return a null
/// SDValue if the target declines to use custom code and a different
/// lowering strategy should be used.
virtual SDValue
EmitTargetCodeForMemmove(SelectionDAG &DAG, DebugLoc dl,
SDValue Chain,
SDValue Op1, SDValue Op2,
SDValue Op3, unsigned Align, bool isVolatile,
const Value *DstSV, uint64_t DstOff,
const Value *SrcSV, uint64_t SrcOff) const {
return SDValue();
}
/// EmitTargetCodeForMemset - Emit target-specific code that performs a
/// memset. This can be used by targets to provide code sequences for cases
/// that don't fit the target's parameters for simple stores and can be more
/// efficient than using a library call. This function can return a null
/// SDValue if the target declines to use custom code and a different
/// lowering strategy should be used.
virtual SDValue
EmitTargetCodeForMemset(SelectionDAG &DAG, DebugLoc dl,
SDValue Chain,
SDValue Op1, SDValue Op2,
SDValue Op3, unsigned Align, bool isVolatile,
const Value *DstSV, uint64_t DstOff) const {
return SDValue();
}
};
} // end llvm namespace